Answer:
56 J
Explanation:
Formula to find the kinetic energy is :
E_kEk = \frac{1}{2}21 × m × v²
Here ,
m ⇒ mass
v ⇒ velocity
Let us solve now
E_kEk = \frac{1}{2}21 × m × v²
= \frac{1}{2}21 × 7 kg × ( 4 ms⁻¹ )²
= \frac{1}{2}21 × 7 × 16
= \frac{1}{2}21 × 112
= 56 J
Hope this helps you :-)
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Answer:
1) B (++ and --)
2) A (1 2 3 4 5)
Explanation:
In the first question, the operators ++ and -- are used in almost all programming languages for adding and subtracting 1 respectively from an operand.
In the second question using a while statement the numbers 1-5 is printed out because the variable n=1 is increased by 1 after each iteration.
Answer:
To help with them with their work
